When I type a URL in angle brackets, such as <http://www.example.com>, in a comment, the URL is not detected and linked. Supporting this would allow links to be used more naturally in the flow of text in a comment.

This notation is recommended for embedding URLs in running text by RFC 2396; quotes are also recommended (I do not know if quotes work or not).

You can just put the bare URL and it will be linked. As an alternative to that, you can make a link say whatever you want (including the text of the URL) if you surround the text with [] followed by the URL in ().

Thank you - this does work as a work-around. I had not thought of it (I did not realize that the subset of Markdown supported in comments includes titled hyperlinks).
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Michael EkstrandAug 16 '10 at 2:43

The above comment was created from the source markdown: http://www.example.com
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jjnguyJul 11 '10 at 5:50

Yes, adding raw links works. However, it can be quite useful to use a delimiter, particularly if the URL is followed by text which is a valid URL character (such as a comma).
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Michael EkstrandAug 16 '10 at 2:42